<span>Population density (in agriculture: standing stock and standing crop) is a measurement of population per unit area or unit volume; it is a quantity of type number density. It is frequently applied to living organisms, and most of the time to humans.</span>
The correct answer is Nucleic Acids.
Explanation: Nucleic acids - macromolecules containing hydrogen, oxygen, nitrogen, carbon and phosphorus and are associated with organism's genetic code.
They have served their purpose and are no longer needed by the plant.
Answer: Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
Explanation: Atoms consist of three basic particles: protons, electrons, and neurons.
